Pump



F. ROBERTS.

PUMP.

APPLICATION FILED JULY 15| 1920.

Patented Dec. 6, 1921.

WIM/8856 UNIT STATES FANT ROBERTS, OF ELDORADO, KANSAS.

PUMP.

Specification of Letters Patent.

Patented Dec. 6, 1921.

Application filed July 15, 1920. Serial No. 396,442.

To NZZ whom t muy concer/n Be it known that l, FANT Renners, a citizen of the United States, and resident oi Eldorado, in the county ci' Butler and State or Kansas, have invented certain new and useful Improvements in Pumps, of which the following is a specification.

My invention is an improvement in pumps. and has for its object to provide pump especially adapted for use with oil wells for pumping oil, wherein the pump has a double barrel and a double plunger, together withv valves arranged to permit the plungers to function simultaneously to litt the oil.

In the drawings, v

Figures 1 and 2 show the improved pump in longitudinal section.

In the present embodiment of the invention, an upper barrel 1 is provided, and a lower barrel 2, the upper barrel being oit greater diameter than the lower barrel, and the upper end of the Ylower barrel is connected to the lower end of the upper barrel in any suitable or desired manner. An upper plunger 3 is arranged within the upper barrel, and a lower plunger 1 is arranged within the lower barrel. These plungers are hollow, cylindrical bodies, as shown, and they have packing washers 5 and packing rings 6, which insure a tight `fit between the barrel and the plunger.

At the upper end of the upper plunger, there is arranged a valve crown, or '7, in which is mounted a ball valve 8. and this valve cooperates with a reversible seat 9,A

connects the bushing with the upper end of' the plunger 8. This bushing 10, as shown, has an annular rib, which is arranged between the abutting ends of the crown 7 and the union 11. v

The packings and packing rings are held on the plungers by nuts 12 and lock nuts 13. and the plungers are connected by a section 14 of piping, which connects at its ends with the plungers, forming a continuous passage through the plungers. VThis section 14 of pipe is connected to the lower plunger by means of a union 15, and this union is a valve cage or crowns The upper end of the lower plunger is a seat with which a ball valve 16 in the cage'or crown coperates.

The lower barrel 2 isV connected at its lower end by a union 17 with a pipe or casing 18 which has a transverse partit-ion 19. Above the partition, the wall of the casing is perforated, while below the partition it is impericorated, and the lower end of this casing 1S iits into the enlargedend of a union 20. The enlarged lower end of this union is engaged by a similar casing 21, having the partition 22 with the perforated wall above and imperiorated wall below.

Valve casings 22 are arranged within the Y lower end of the barrel 2, the union 20, and a union 23 similar to the union 20 and connected with the lower end of the casing 21, all of these valve bodies 22 being alike, and earch consisting of the body, a. crown or cage 24,. and a ball valve 25. Each valve body as shown has packing rings, and the ball valve cooperates with the upper end of the body as a seat. i v

A casing 26 similar to the casings 18 and 21, vis connected with the lower end of the union 28. Pipes 27 and 28 extend longitudinally oit the barrels.` at opposite sides thereof, and each oi the said pipes 27 and 28 communicates with the barrel 1 at its upper end, as clearly shown at 29 in Fig. 1, by means of an elbow or the like.

Thefpipe 29 has a. T 30 interposed in its length, and the lateral branch of the T communicates with the barrel 1 just below the upper plunger. A stuiiing box 31 is arranged at the upper end of the connecting pipe 14C which connects the plungers, between the said pipe and thebarrel 2` and the T 30 connects with the barrel between the stufiing box and the upper plunger.

The pipe 28 has a T 32 in its length, whose lateral branch communicates with the barrel 2 just below the stuiling boX 3l. This stufiing box consists lof the usual packing, and the retaining rings at the ends, the said rings being beveled in the usualmanner. The lower end of the pipe 27 communicates with the casing 18 below the partition 19. the arrangement being such that the uppermost valve 25 is above this communication. The pipe 28 connects at its lower end with the casing 21 below the partition 22, and the arrangement here is such that the intermediate valve 25 is above such communication and between the same and the communication of the pipe 27, while the lowermost valve is below the said communication.

The operation of the device is as follows :g Suitable operating mechanism being con nected with the uppermost plunger, when A the said plunger is drawn upward, the lower plunger, of course, moving therewith, liquid will Vbe drawn into the lower end of the lower barrel by the lower plunger, the liquid passing by way fof the casing 18 and past the up er valve 25 into the lower barrel. Liquid wil also be drawn into the upper barrel above the stuing box 31 bv the upper plunger, the liquid passing by way of the casing 21, the intermediate valve 25, the pipe 27, and the T 30.`

Check valves 33 of usual construction are interposed in the length of the pipes 27 and 28. A check valve is arranged on each side of each T 30 and 32. These check valves are arranged to permit the free, upward flow of the liquid but to prevent the downward How of the liquid. On the downward stroke of the pump, liquid is drawn into the lower barrel above the lower plunger fi through the casing 26, the lowermost valves 25, the pipe 28 andthe T 32, the check 33 below the T 32 preventing the return of the liquid. That liquid which is below the upper plunger is forced out through the T 30 and the pipe 27 to the barrel 1 above the plunger 3, the check valve `above the T 30 preventing the return of the liquid, and that check valve 33 below the T preventing the passage of the liquid downward. That liquid which is below the lower plunger is forced out past the check 16 and through the pipe 13` and the upper plunger and past thi2 check 8 to the upper portion of the barre l. Y

The downward movement oi the upper plunger assists in the circulation of the liquid from below the plungers to above the plungers. Thus on each stroke of the pump in both directions there is a movement of liquid b both plungers.

` I claim 1. A pump comprising upper and lower connected barrels, a plunger in each barrel, said plungers being hollow, a hollow connection between the plungers, a stufling box between the plungers through which the connection moves, check valves in connection with the plungers for permitting the'ree, upward movement of the liquid and for preventing the downward movement, a plurality `of connections bet-Ween the upper barrel above the upper plunger and the lower barrel `belowthe lower plunger, each of said connections connecting intermediate its ends with one of the barrels, one of the conne@ tions being above the stuling box and the other below these-id box, check `valves in each of the said connections above and below the communication with the barrels, the said connections at their communication with the lower barrel being olisetV with respect to each other, a-check valve below each of the said communications, and a check valve between the uppermost of the said communications and the lower plunger, said valves being arranged to permit the free, upward flow of' the liquid and to prevent the downward iiow.`

2. A pump comprising a casing, a plurality of double acting ',plungers rigidly connected and ported to permit the tree flow ot liquid from below the lower plunger to above the upper plunger, check valves for preventing the downward flow of the liquid through the plungers, a stuffing box in the casing between the lplungers, a plurality of by-passes in connection with the casing and connecting that part of the casing above the upper plunger with that part of the casing below the lower plunger, and communicating with the casing intermediate the ends of the by-pass'es and between the plungers, and check valves for constraining the liquid to iiow upwardly through the by-passes, the connection of the'by-passes with the casing below thel lower plunger being oil'set longitudinally of the casing with respect to each other, and check valves below the said connections of the by-passes and above the uppermost connection.

3. A pump comprising a casing, a plurality of double acting plungers rigidly connected and ported to permit thefree flow of liquid from below the lower plunger to above the upper plunger, check valves for preventing the downward iiow of the liquid through the plungers, a stuiing box in the casing between the plung'ers, a plurality of bypasses in connection with the casing and connecting that part of the casing above the upper plunger with that part of the casing below the lower plunger, and communicating with the casing intermediate the ends ofthe by-passes and between the plungers, and check valves for constraining the liquid to flow upwardly through the by-V passes.

4. A pump comprising a casing, a pair of `rigidly connected double acting plungers in the plungers and lcheck valves in the bypasses aboveand below said connection between the plungers for constraining the liqto iiow upwardly.

5. A pump comprising upper and lowei` connected barrels, a plunger in each barrel, a connection between the plungers, a stuiiing box between the plungers through which the connection moves, a. plurality of connections between the upper barrel above the upper plunger and the lower barrel below the lower plunger, euch of said connections connecting intermediate the ends with one of the barrels, one or" the connections being above the Stui'ling box andthe other below the Said box, and check valves for constraining the liquid to flow upward.

6. A lpunip comprising upper and lower connected barrels, a. plunger in each barrel, said plungers being connected, a plurality of connections between the upper barrel above the upper plunger and the lower barrel below the lower plunger, each of said connections connecting intermediate its ends with one of the barrels, said connections at their communica-tion with the lower barrel being oilset with respect to each other, an imperorate partition between the offset points of communications of 'the connections of said connections with the lower barrel and an imperforztte partition between the point of communication with the upper of said connectio-ns and the lower barrel and the lower plunger, and check Valves for constraining the liquid to iow upward.

FANT ROBERTS. 

